Vibratory distributor of electric current



a ibozwq E. s. SANDBERG Filed April 20. 1925 2 snQetS -Snen 1 v [age/2&5. Sandbag,

July 12, 1927.

VIBRATORY DISTRIBUTOR OF ELECTRIC CURRENT 1,635 02 E. S. SANDBERG VIBRATORY DISTRIBUTOR 0F ELECTRIC CURRENT July 12 1927.

Filed April 20. 1925 2 Sheets-Sheet '2 c {aye/266. 567120603 Patented July 12, 1927.

- ivrnnazr'oity 'msr nisoion or emanate uoxmmx'm.

Original application med-Mayra;'i924,'-;s riaritos715,264; infirm(1 ai'ur-ems-appiica'min mea A-pi'il' '20,

- a :1925. Seria1No.24r',563." r e This invention relates to --a -vibratory -distribiitor"of electric current, which is adapt-- ed to be peratetl in synehronism with another rihratory eli'nent Eby means of a periodieally pulsatingoirrreiit ,More specifically; it irelates -to a device adaptedito employed in an electrical communication I system ron distribiiting the 1 components of complex signalling' eurrent in a imain line 1i? in-p1roper=sequenee to respectii' e b-ran'ch lines leadin therhom, which device operates in syn'ehromsm with a similar d'istributor' or mateet the other end of the rn a-in line; Eh-is app aratus I is employedin my" imp rovetl tele- 15 graph-system; disclosed in Patent No. 1 ,5165,-

"507 granted-Dec; 15, 1925y-and of Which the present a plication is a division.

' {@ne of the objects o' f th-e 'pre'sentdnvention is to provide a distributor of the 'kind described having vibrator which can be timed to I the freqiiencyiof the: operating 'ipulsating 1 current, and Whose oscillations may "be sustained by "the application of ransexoee dingly small amount: of electrical energy. Another objeot is to "provide meanset'or regulating: thenam plitude. ofzvibnation oil the vibr ator' independently of the operatin gipnlsating current. Y

tlrer objettg and advantageswill appear :m 'in the; course on the sfollowing description.

' lIn th' accompanying drawings [forming epart-i o'fithis s'peeifieatiomz iirwhich like num bers of reference denote like parts wherever theypocnr, Y v

' Figure 11 :is :a iplan VlEWV of. m1 apparatus .xi hiieh iin'elndes a main distributing vibr'ator and.itwowauxiliary :vilooators' made in :ac -cor'da'nce :with i this invention; 1

iFi'gur'e: 2 is .an i elevation of the :smne Eign-re 3iisz-a sectional .VlGW onitheirregufhirzlinei3-3 ofEignreBi Figure 5L is fragmenoaqe elevational "view er one of'tlie details ofthe instruments; and Fi'gnre is a seotion-al viewonthe line o o of Figni-e 1-.

The distributingVibrator l andtwoanX- iliaryvibrators z' needetl at each en'd ofth-e main l'ine in the particular system disclosed in s aiclprior application, arepre'fer-ably mounted on a common insulating base or block' ii, preferably slate, as shown in F igvibrators-are constructed of long 'rods 'of spring steel, supported at i their rear-ends in posts'og-seciiredto theibase il by' bolts 6. The

posts?) *are split-at theirupper' ends toform jaws 7 f r o'l an pin'gathe armatures 4, "the said jaws being drawn together screws '8. r The free end of \eaeh of the mmatures extends between the, poles9 ot a pain-0f enter-magnets 10'. 13119" poles 9" are preferablylboredi'to fifi theaeyli'nclrieil eore's 11- of theeleet'roma giiet-s10,- ai1d=are split .e's' at 12 so-tli-attheyniay =be tightIY secured to the projeetingaends of the cores 1 1 -by 1 means or the elaniping screws 13. Tlie'other ends of the 'e'ores ll project int o-the yoke 14:, which ok es are -bor'etl f to fit th-e -cores 11 andsplit :a's at 15 to permit of clamping around the cores 1=1iby means *of the sorews 16. 'The yoke 14E is secured tothe base l by'sc'rew-s 1 7.

*Tl r e' ends of the -eiee t-romagnets 10 adjacent the po l-e pieees 9 are lield within a reetairgn lariiame com rising side members or posts 18, lower or base member "119, and :up-

' oer ineinber 20; the said membersbeing f astened together "in any suitable manner, and

tlre lower member 19' loeing secured to the bases preferablylh -sorew :21.

Cores 11, pole 'pieces i), andgy'oke Mei-e tabriea ted of so it iroine antl magnetism i induceid therein day -:a permanent magnet "22, of substantially teshape :cnmprising a fina- Ejo1:--=ar m i 23 extending r across the 1 top of the pair ofele'ct-romagr-Iets 1!) i -ronr the yoke; end of the pole end and a minor arm 24, depending from tliearmflfi'at the yo'kexend. Pintlesf'25,preferiaMy'fQrnad integral Wlth'litllll 23, aprojeet laterally therefrom '5 toward the posts 18, zan'd are pivoted in bearings :26

1 {formed :inrthewends of screws: 27 threading in tappedlh'oles 28 sformedin it'lle posts .18. Arm 24? normallyitendgito: gravitateitowards yoke 14, ibiit :itssproximity' to ithe yo'ke is limited rloy adjusting screw 29; bornezby the )projeetion f'30wof brace ":20 rand impinging iagainstltheitop of the projection 31 of the freeiend of' thev m-a'j or: arnr2'3.

'Gon'tact posts '32 are juxtaposetl to rthe free ends :of ithe arinatures 4', being secured to the base '3 by =bolts f The middle vibratoris the distributoi',sandit is totbenoted that there memo Contact :po'sts associated therewith, one on each side ofits: armature :whil e theroutside vibrators :are the auxilgle contact post. The contact posts are provided with contact screws 84:, provided with the usual contact points 35 of platinunn iridium or other suitable contact material, and are prevented from shitting by the usual checknuts 36. The Contact points are contacted by similar contact points 3? on riders or resilient blades 38 secured to the sides of the armature 4:. The natural period of vibration of the armatures a may be varied by moving the sliders 39 back and forth along the said armatures. The said sliders 39 may be fixed in any definite position by tightening the set screws a0, and are so adjusted that their natural periods of vibration are in resonance with the pulsations oi the alternating current passing through the electromagnets 10. y

The quantity of magnetism induced in the cores of the electromagnets by the perma nent magnet 22 may be varied by adjusting the screw 29 to vary the distance between the yoke 14 and the arm 2%. The greater the per cent of magnetism so picked up by the cores, the more intense will the vibration of the armature be for a given value of alternating current. The pole pieces 9 are, of course, of the same polarity, being alternatively strengthened and weakened by the alternating current. Regardless oi? the amount of current in the coils, the intensity of the vibration can only be determinedf by the difference oi pull between the pole pieces 9 on the armature, and this difference is determined by the amount of permanent magnetism transmitted to the cores. This mag netism is alternately chopped out by the ac tion of the alternating current.

Any suitable frequency of alternating cu rrent may be used, but the conventional frequency of sixty cycles per second is deemed preferable, the arn'iatures lbeing tuned thereto. Each of the vibrators really constitutes an electric synchronous motor which operates on a surprisingly low current. By winding the coils of the clectromagnets 10 to about live-hundred ohms resistance, the an mature can actually be keptin synchronism with the alternating current on as low a valve as one millian'ipere of current. The effect ol" the currents from the telegraph transmitters on the viln'ating reeds is practically negligible, for the obvious reason that the vibrating reeds are not in resonance with the irregular pulsations oi the teleg aph current.

The current from the main line, of course, passes through post 5, reed i and thence alternately to the respective branch line posts 32 through the contacts 35 and 38 as the reed l vibrates from one side to the other.

Having thus fully described this invention, I hereby reserve the benefit of all changes in form. arrangement, order, or use of parts, as it is evident that many minor changes may be made therein without departing -irom the spirit of this invention or the scope of the following claims.

I claim:

1. A vibratory distributor of electric current comprising a pair of electro-magnets each having a core, a yoke connecting the core ends of like polarity together and a permanent magnet mounted for adjustment with relation to the yoke.

A vibratory distributor of electric current comprising a pair of electro-magnets each having a core, a yoke connecting the core ends of like polarity together, a permanent magnet mounted for movement to permit adjustment thereof toward and away from said yoke and means for limiting the movement of the permanent magnet toward the yoke.

3. A vibratory distributor of electric cur rent comprising a pair of electro-magnets each having a core, a yoke connecting the core ends of like polarity together, a permanent magnet mounted for adjustment with relation to the yoke and an armature mounted for movement and adapted to he alternately attracted toward the poles of the electroanagnet when an alternating current therethrough weakens one electro-magnet and sinmltaneously strengthens the other, and vice versa.

i. A vibratory distributor of electric current comprising a pair of electro-magnets each having a core, a yoke connecting the core ends of like polarity together, a permanent magnet having its poles mounted for movement toward and away from said yoke, adjustable means for limiting the movement of one of said poles toward the yoke, and an armature mounted for vibratory movement between the poles of the electro-magncts when an alternating current is passed therethrough and simultaneously weakens one magnet and strengthens the other, and vice versa.

5. A vibratory distributor of electric current comprising a pair of electro-magnets each having a core, a yoke connecting the core ends of like polarity together, a permanent magnet having a core mounted for pivotal movement and with one of its ends juxtaposed with relation to the yoke, means for varying the inclination of the permanent magnet about said pivot and an armature mounted for vibratory movement between the poles of the electro-magnet and adapted to be attracted alternately toward the free ends of the poles when an alternating current is passed through the electro-magnets and weaken said current in one magnet and strengthen the current in the other magnet and vice versa.

6. A vibratory distributor of electric current comprising a pair of elcctro-magnets each having a core, and arranged in spaced parallel relation, a yoke connecting the core ends of like polarity together, a frame disclination of the permanent magnet with relaposed over the other ends of said magnets, tion to the electro-magnets and the cores a permanent magnet pivoted to theframe, thereof. 7

means carried by the frame for shifting the In testimony whereof I hereunto affix my 10 5 position'of the permanent magnet, said shiftsignature.

ing means adapted to vary the angle of in- EUGENE SIXTEN SANDBERG. 

